I remember being quite surprised when I visited Australia for the first time to find people like bank tellers wearing shorts as a matter of course. It looked a bit odd to me, but clearly it just was, to quote the expression upthread, 'the done thing'.We used to have a dress down day every 4th Friday of the month. Through summer I wore shorts every time. In August, my manager pulled me and said that 'Wearing shorts isn't really the done thing'. I looked pointedly at the ladies in the office sashaying around in skirts. He had no come back, but I was still the only guy in an office of around 2,000 that ever wore shorts.
Cowards.